Immunogen sequence: LDELPKFEKN FYQEHPDLAR RTAQEVETYR RSKEITVRGH NCPKPVLNFY EANFPANVMD VIARQNFTEP TAIQAQGWPV ALSGLDMVGV AQTGSGKTLS YLLPAIVHIN HQPFLERGDG PICLVLAPTR ELAQQVQQV. DEAD box proteins, characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD),